[Bug 14994] Random Panic/Freeze due to BUG: unable to handle kernel NULL pointer dereference at 00000024(?)

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https://bugzilla.kernel.org/show_bug.cgi?id=14994





--- Comment #5 from Marc H. Thoben <kernelbug@develz.org>  2010-04-11 12:12:29 ---
Hello Borislav,

I'm happy you are willing to take a look at this. I'll attach the syslog
excerpt (which looks a bit messy due to netconsole, I believe) and the kernel
config now.

Admittedly I've been sinning for some years and have just returned to Linux
when I bought the new hardware... which means it'll take me a while to remember
how to compile the kernel myself. But I'll get there again :)

I can easily reproduce the crash by loading ide-cd_mod, activating composite
tweaks in xfce4 and running glxgears in a window. As soon as the terminal is
supposed to show the FPS I'll get the kernel panic.

Googling lead me to believe this is caused by the massive interrupt calls that
the closed-source nvidia driver is doing. I had the same crash, but not so
easily reproducable with the closed-source ati driver.. yes.. I switched
graphic cards on the hunt for these kernel panics. Until I found the netconsole
module and knew it's the ide/cdrom.

Sorry, I'm drifting off. I will post the debugging info as soon as possible.

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